Kr has the atomic number of 36. It has similar number of electrons and protons.
From the element name go to the periodic table and look for the atomic number. This is equal to the number of protons and to keep the atom neutral is also equal to the number of electrons.
Magnesium
On the periodic table it is above the letter name of the element. I don't know where else you would find a an atomic mass of an element. The atomic number tells how many protons and electrons are inside. The amount of protons and electrons are always the same.
Gallium
protons,neutrons,electrons, and the element name
Neutrons. If the differ in electrons they are not neutral and if they differ in protons then they are no longer the same element as the number of protons determines the name of the element.
The isotope of oxygen, 8O17
You can find out the symbol, name, mass, state, protons, neutrons, electrons, electronegativity, valence electrons, charge, and many other characteristics of the element considering the characteristics of other elements in the same group or period.
'S' look for it on the periodic table for full name.
Protons are protons, no matter what element they are in.
Find the element on the periodic table. Look at the number on the top. It is the relative atomic mass. Some Elements: Na - 23, Ne - 20 If you are not given the element name but only the information of the neutrons, protons and electrons. Add the protons and neutron together as they both are the one which contribute to the mass of the atom. Electrons are small so they do not add up to the mass of atom. Example: Element - Y (contain 2 protons, 2 electron, 2 neutron) Ar is 4. From the you can find out that element is He - Helium.
The number of protons in its nucleus, the number of electrons it has and its name.